let arr = ['JSPang','技术胖','蛋蛋'];
// console.log(arr.fill('web',1,3));

//数组循环
console.log("下面是数组循环");

for (let [index,val] of arr.entries()){
    console.log(index + ':' + val);
}

let list = arr.entries();
console.log(list);
console.log(list.next().value);
console.log('----------------');
console.log(list.next().value);
console.log('****************');
console.log(list.next().value);
console.log('================');